Things to do

[joamatab]

gdsfactory/gdsfactory#176

TODO

• make PCells (see below)
• add pyspice demos fir models and simulations
• add notebooks with documentation
• LVS. In LVS, the software will extract the fundamental components (e.g. diodes, transistors) based on the layout and compare it to the netlist
• QRC extraction, or more accurately, RLCK parasitic elements. This is essential for RF circuits, otherwise, the simulation results are useless.
• Customize main parametric components such as transistors, capacitors, diodes resistors, etc. Remember, those ready-made blocks you show in your video from Skywater are not very useful in this context as they are for automatic digital place and route. Once this is completed, a spice-compatible netlist is generated, and we can use ngspice and EEsim to display results etc.

Pcells to make

• NMOS
• transistors
• capacitors
• diodes
• resistors

Maybe

• openroad plugin. Invoke Yosis from gdsfactory

@proppy
@mithro
@danchitnis
@SkandanC

[daquintero]

I'd be happy to help integrate a GDSFactory/OpenRoad plugin as I already have something similar I hope to be releasing soon!

[joamatab]

nice Dario,

we have also been thinking about integrating with vlsir

@growly
@dan-fritchman

[tcaduser]

Is there any need for open source capacitance extraction?

[daquintero]

I've seen some really cool work in gplugins re Elmer capacitance extraction open source. I guess a demo on this Skywater 130nm pdk would be really cool for analogue/RF design!

[mithro]

There is gds2para - https://github.com/purdue-onchip/gds2Para

[joamatab]

https://gdsfactory.github.io/gplugins/notebooks/elmer_01_electrostatic.html

@nikosavola

[tcaduser]

Thanks. The Elmer thing is something I was going to offer to be done using DEVSIM. However, it looks like Elmer is already doing it!

[joamatab]

a DEVSIM alternative tutorial would be great, as it's easier to install

PRs mostly welcome for this

[nikosavola]

The same capacitive simulation can also be done in Palace, which might be easier to set up, see https://gdsfactory.github.io/gplugins/notebooks/palace_01_electrostatic.html

[tcaduser]

a DEVSIM alternative tutorial would be great, as it's easier to install

PRs mostly welcome for this

thanks, I'll look into it

[simbilod]

@tcaduser I have working code setting up DEVSIM simulations from gdsfactory primitives, we can apply it to the cells here